I have them in my Stiletto, and all I can say in a word is "BIG". They are fat sounding, indeed. JJ's, to be exact. They really have a 6L6 feel, specifically in the relaxed mids, and much rounder/fatter than an EL34.
Sorry, no experience with the Wizard, but I'm sure it would still apply. If you want aggressive, these aren't for you. If you want big, bold, and fat with more headroom, they're right up your alley. If you want to give them a try, let me know. I may pull them out in favor of KT77's. There's only about 10 hours on them.